One common theme is power struggle. In a dark world, different factions or individuals often compete for power, like in 'Overlord' where the protagonist has to assert his dominance in the game world. Another theme is survival. For example, in 'Grimgar of Fantasy and Ash', the characters are constantly fighting for their lives.
Isolation is also a theme. In many 'dark world light novels', the main character may feel alone in this strange and often cruel world. For instance, in 'Re:Zero − Starting Life in Another World', Subaru often feels isolated as he is the only one who can remember his previous deaths. Additionally, moral ambiguity is common. Characters may have to make difficult choices between right and wrong in order to survive in the dark world.
A sense of hopelessness can pervade these novels. The world is often in a state where it seems there's no way out. For instance, in stories where a disease has wiped out most of humanity and the remaining people are just trying to hold on. The exploration of human nature under extreme pressure is also common. Do people become more cruel or find a way to hold onto their humanity in these dark eras?
One common theme is redemption. For example, in many stories, a character who has done bad things (the dark part) gets a chance to change and be redeemed (the light part).
One common theme is the struggle between good and evil, which is quite obvious from the name. The light often represents good and the dark represents evil, and the characters are usually caught in this eternal struggle.
One common theme is self - discovery. The world teacher often discovers new things about themselves as they teach in a different world. For example, they might find out they have abilities they didn't know before.
One common theme is the pursuit of immortality. Characters are often on a quest to gain eternal life, which involves a lot of cultivation, learning powerful techniques, and facing dangerous trials.
Power struggle is a common theme. Different factions or characters often vie for control over the world order.
The light theme often represents hope, goodness, and positive values. For example, in many fairy tales, the hero or heroine who is kind - hearted and brave represents the light. The dark theme can symbolize evil, despair, or challenges. In horror stories, the dark forces are often the source of fear. Common expressions of light themes include bright colors, kind characters, and happy endings. Dark themes may involve dark settings like a spooky forest or an old, haunted house.
One common theme is heroism. Characters often display heroic qualities as they face difficulties in the World of Light.
One common theme is the use of modern knowledge in a medieval or fantasy - like business setting. For example, the main character might introduce new farming techniques or manufacturing methods.
Survival is a very common theme. Characters have to find ways to stay alive in a world that has been turned upside down. For example, in 'Is It Wrong to Try to Pick Up Girls in a Dungeon?', Bell has to constantly improve his skills to survive in the dungeon - filled world.